OPTICAL PROPERTIES OF Eu3+ IONS DOPED ALUMINOSILICATE GLASS

Abstract

Eu³⁺ -doped aluminosilicate (AlSi) glass with the concentrations of 1.0 wt % was prepared by Sol-gel method. Optical excitation and emission spectra of Eu³⁺ ions have been investigated. The phonon sideband (PSB) associated with the ⁷F₀-⁵D₂ excitation transition is used to determine the electron–phonon coupling constant and the local structure of the local environment around Eu³⁺ ions. The luminescence intensity ratio of the ⁵D₀-⁷F₂ to ⁵D₀-⁷F₁ transition has been calculated to estimate the local site symmetry around the Eu³⁺ ions. The Judd–Ofelt (JO) intensity parameters Ω_λ (λ=2, 4, 6) are calculated from the emission spectra and are used to estimate the transition probability (A), branching ratios (β), the stimulated emission cross-sections (σ_λp) for the excited levels ⁵D₀ of the Eu³⁺ ions.